New posts in Gt.Geometric Topology

restricting the "Whitney" map

Why does not a closed 3-manifold modelled on SL(2,R) admit a metric of nonpositive curvature?

Can you cover a genus a billion hyperbolic surface with 15 balls?

Higher homotopy groups of irreducible 3-manifolds

Complement to a union of spheres in a sphere

Quantitative word problem for 3-manifold groups

Very particular kind of 4-manifolds. Classification

Homotopy groups of Diff(X) and Homeo(X)

Unique almost complex structure up to diffeomorphism

Group of surface homeomorphisms is locally path-connected